ICD-10-CM Code H10.9

Unspecified conjunctivitis

Version 2020 Billable Code

Valid for Submission

H10.9 is a billable code used to specify a medical diagnosis of unspecified conjunctivitis. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code H10.9 might also be used to specify conditions or terms like bacterial conjunctivitis, bilateral conjunctivitis, conjunctivitis, conjunctivitis associated with autoimmune skin disorder, conjunctivitis associated with autoimmune skin disorder, conjunctivitis associated with epidermolysis bullosa, etc

Short Description:Unspecified conjunctivitis
Long Description:Unspecified conjunctivitis

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code H10.9 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Bacterial conjunctivitis
  • Bilateral conjunctivitis
  • Conjunctivitis
  • Conjunctivitis associated with autoimmune skin disorder
  • Conjunctivitis associated with autoimmune skin disorder
  • Conjunctivitis associated with epidermolysis bullosa
  • Conjunctivitis due to Bordetella pertussis
  • Conjunctivitis due to lichen planus
  • Conjunctivitis due to reactive arthritis triad
  • Conjunctivitis of bilateral eyes caused by bacteria
  • Conjunctivitis of left eye
  • Conjunctivitis of left eye caused by bacteria
  • Conjunctivitis of right eye
  • Conjunctivitis of right eye caused by bacteria
  • Follicular conjunctivitis

Clinical Information

  • CONJUNCTIVITIS-. inflammation of the conjunctiva.
  • CONJUNCTIVITIS ACUTE HEMORRHAGIC-. a highly contagious disease characterized by subconjunctival hemorrhage sudden swelling of the eyelids and congestion redness and pain in the eye. epidemic conjunctivitis caused by enterovirus 70 ev 70 was first described in africa in 1969. it is caused also by coxsackievirus a24 variant ca24v. epidemics by this organism have appeared most frequently in asia.
  • CONJUNCTIVITIS ALLERGIC-. conjunctivitis due to hypersensitivity to various allergens.
  • CONJUNCTIVITIS BACTERIAL-. purulent infections of the conjunctiva by several species of gram negative gram positive or acid fast organisms. some of the more commonly found genera causing conjunctival infections are haemophilus streptococcus neisseria and chlamydia.
  • CONJUNCTIVITIS INCLUSION-. an infection of the eyes characterized by the presence in conjunctival epithelial cells of inclusion bodies indistinguishable from those of trachoma. it is acquired by infants during birth and by adults from swimming pools. the etiological agent is chlamydia trachomatis whose natural habitat appears to be the genito urinary tract. inclusion conjunctivitis is a less severe disease than trachoma and usually clears up spontaneously.
  • CONJUNCTIVITIS VIRAL-. inflammation often mild of the conjunctiva caused by a variety of viral agents. conjunctival involvement may be part of a systemic infection.

Diagnostic Related Groups

The ICD-10 code H10.9 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2020 through 09/30/2020.


Convert H10.9 to ICD-9

Code Classification

  • Diseases of the eye and adnexa (H00–H59)
    • Disorders of conjunctiva (H10-H11)
      • Conjunctivitis (H10)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Conjunctivitis is the medical name for pink eye. It involves inflammation of the outer layer of the eye and inside of the eyelid. It can cause swelling, itching, burning, discharge, and redness. Causes include

  • Bacterial or viral infection
  • Allergies
  • Substances that cause irritation
  • Contact lens products, eye drops, or eye ointments

Pinkeye usually does not affect vision. Infectious pink eye can easily spread from one person to another. The infection will clear in most cases without medical care, but bacterial pinkeye needs treatment with antibiotic eye drops or ointment.

NIH: National Eye Institute

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